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A complex signaling network involving protein kinase CK2 is required for hepatitis C virus core protein-mediated modulation of the iron-regulatory hepcidin gene expression
(2014)
Hepatitis C virus (HCV) infection is associated with hepatic iron overload and elevated serum iron that correlate to poor antiviral responses. Hepcidin (HAMP), a 25-aa cysteine-rich liver-specific peptide, controls iron ...
Building arks for tRNA: Structure and function of the Arc1p family of non-catalytic tRNA-binding proteins
(2010)
Following the intricate architecture of the eukaryotic cell, protein synthesis involves formation of many macromolecular assemblies, some of which are composed by tRNA-aminoacylation enzymes. Protein-protein and protein-tRNA ...
Molecular determinants of the yeast Arc1p - Aminoacyl-tRNA synthetase complex assembly
(2007)
Eukaryotic aminoacyl-tRNA synthetases are usually organized into high-molecular-weight complexes, the structure and function of which are poorly understood. We have previously described a yeast complex containing two ...
Incorporation of the Arc1p tRNA-binding domain to the catalytic core of MetRS can functionally replace the yeast Arc1p-MetRS complex
(2008)
The catalytic core of methionyl-tRNA synthetase (MetRS) is conserved among all life kingdoms but, depending on species origin, is often linked to noncatalytic domains appended to its N- or C-terminus. These domains usually ...
The intracellular location of two animoacyl-tRNA synthetases depends on complex formation with Arc1p
(2001)
In yeast, two aminoacyl-tRNA synthetases, MetRS and GluRS, are associated with Arc1p. We have studied the mechanism of this complex formation and found that the non-catalytic N-terminally appended domains of MetRS and GluRS ...
The tRNA aminoacylation co-factor Arc1p is excluded from the nucleus by an Xpo1p-dependent mechanism
(2005)
Arc1p, a yeast tRNA-binding protein, forms a complex with the aminoacyl-tRNA synthetases, methionyl tRNA synthetase (MetRS) and glutamyl tRNA synthetase (GluRS). Although this complex localizes normally in the cytoplasm, ...
Lack of pseudouridine 38/39 in the anticodon arm of yeast cytoplasmic tRNA decreases in vivo recoding efficiency
(2002)
Many different modified nucleotides are found in naturally occurring tRNA, especially in the anticodon region. Their importance for the efficiency of the translational process begins to be well documented. Here we have ...
The dietary flavonoid kaempferol effectively inhibits HIF-1 activity and hepatoma cancer cell viability under hypoxic conditions
(2010)
Hepatocellular carcinoma (HCC) is characterized by high mortality rates and resistance to conventional treatment. HCC tumors usually develop local hypoxia, which stimulates proliferation of cancer cells and renders them ...
Atypical CRM1-dependent nuclear export signal mediates regulation of hypoxia-inducible factor-1 alpha by MAPK
(2008)
Hypoxia-inducible factor 1 (HIF-1) is the key transcriptional activator of hypoxia-inducible genes and an important anti-cancer target. Its regulated subunit, HIF-1 alpha, is controlled by oxygen levels and major signaling ...